The graph shows the population change between 1940 and 2000 in three different counties in the U.S. state of Oregon.

The graph illustrates a different growth of the number of people in three distinct cities in the period of time between 1940 and 2000.

Overall

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, a noticeable feature in connection with the first place of the three places with the highest population in Washington in all the ages, with a huge quantity of variation over time. In

Columbia

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and

Yamhill

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, they had a very similar if not exactly the same increase. First of all, in accordance with the figure about Washinton, the most significant feature is the rise of just over 120 in 1970, until reached a peak of double the amount of the population about 240 in 2000.

Subsequently

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, with regard to

Columbia

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and

Yamhill

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, there was a much more steady

grow

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growth

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and relatively stable over the years, with a difference in the quantity of citizens in each stage.

For instance

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, we saw that

Yamhill

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had around 40

thousand

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, in the meanwhile,

Columbia

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had just over 30

thousand

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, in 1940.

Then

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,

Columbia

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had reached just over 75

thousand

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, less than

Yamhill

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which had got around 90

thousand

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, in 2000. In conclusion, there had been different patterns of boost about the different ages, but with a big difference between Washinton and the others.